Heat dissipation structure for PGU of vehicle-mounted HUD optical machine

Abstract

The utility model relates to a heat dissipation structure for a PGU of a vehicle-mounted HUD light machine, which comprises the HUD light machine (1), and a light guide support (2) and the PGU (3) connected with the light guide support (2) are arranged in the HUD light machine (1). And a heat dissipation structure is arranged on the light guide bracket (2). According to the device, a heat dissipation structure is arranged on a light guide support, and a PGU is connected with the light guide support; the heat dissipation structure can quickly transfer heat generated by the PGU from the light guide support to the outside of the HUD light machine. The PGU comprises a lamp panel; the HUD optical machine comprises a rear cover. As one scheme, the rear cover is directly connected with the lamp panel; according to another scheme, a cooling fin is arranged between the rear cover and the lamp panel, and meanwhile heat conduction silica gel is further arranged between the cooling fin and the lamp panel. Therefore, a large amount of heat generated by the lamp panel can be quickly conducted to the rear cover and then transferred to the external environment through the rear cover. Therefore, rapid heat dissipation of the PGU is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of HUD equipment, and specifically relates to a heat dissipation structure for a PGU of a vehicle-mounted HUD optical machine. Background Art

[0002] HUD (Head-Up-Display) is a head-up display, also known as a head-up display system. It refers to a multi-functional instrument panel centered on the vehicle driver, operated blindly. Its function is to project important driving information such as speed and navigation onto the HUD display screen in front of the driver, so that the driver can see important driving information such as speed and navigation without lowering or turning his head. The image generation unit PGU (Picture Generation Unit) is the core component of HUD. The image generation unit PGU is used to generate the HUD output image, which is composed of a light source, an optical film and other optical components. The current interior space of the car is compact, so the size of the HUD imaging unit (PGU) is required to be smaller and smaller, resulting in poor heat dissipation of the entire PGU backlight, affecting the normal operation of the HUD. TFT (Thin Film Transistor) is a thin film transistor. Each liquid crystal pixel on the TFT display is driven by a thin film transistor integrated behind the pixel. Therefore, the TFT display is also a type of active matrix liquid crystal display device.

[0003] After searching, the applicant found that the Chinese patent document with publication number CN217932288U disclosed on November 29, 2022 a heat dissipation HUD mechanism that is easy to disassemble, including: a reflective shell, which is used to install a reflective component, and a light entrance hole is also provided on the reflective shell; a light source shell, which is detachably connected to the reflective shell, and the light source shell is used to install an optical machine light source, and one end of the optical machine light source for emitting light is arranged corresponding to the light entrance hole; a heat dissipation component, which is detachably installed on the light source shell for dissipating heat from the optical machine light source.

[0004] This device cannot achieve rapid heat dissipation for the PGU of a small-sized vehicle-mounted HUD optical engine. Utility Model Content

[0005] The utility model aims to provide a heat dissipation structure for a PGU of a vehicle-mounted HUD optical machine, which can realize rapid heat dissipation of the PGU of a small-sized vehicle-mounted HUD optical machine.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a heat dissipation structure for a PGU of a vehicle-mounted HUD optical machine, comprising the HUD optical machine, a light guide bracket and the PGU connected to the light guide bracket being provided inside the HUD optical machine; a heat dissipation structure is provided on the light guide bracket.

[0007] The heat dissipation structure comprises heat dissipation holes, and the heat dissipation holes are arranged on the side wall of the light guide bracket.

[0008] The heat dissipation holes include a first heat dissipation hole, a second heat dissipation hole and a third heat dissipation hole; the first heat dissipation hole is arranged at the top of the light guide bracket, the second heat dissipation hole is arranged at the bottom of the light guide bracket, and the third heat dissipation holes are respectively arranged on both sides of the light guide bracket.

[0009] The PGU includes a light board; the HUD optical engine includes a back cover.

[0010] As a solution, the back cover is connected to the light board.

[0011] As another solution, a heat sink is provided between the rear cover and the light board.

[0012] A heat conducting member is provided between the heat sink and the lamp board.

[0013] The heat conducting member is heat conducting silica gel.

[0014] The PGU comprises a backlight bracket; the light board is arranged on one side of the backlight bracket, and a backlight cover is arranged on the other side of the backlight bracket; a polarizing plate, a Fresnel lens and a diffuser are arranged between the backlight cover and the backlight bracket respectively.

[0015] The PGU is arranged on one side of the light guide bracket, and a PGU cover plate is arranged on the other side of the light guide bracket; a TFT display screen is arranged between the light guide bracket and the PGU cover plate.

[0016] The beneficial effects of this application are:

[0017] The heat dissipation structure is arranged on the light guide bracket, and the PGU is connected to the light guide bracket; the PGU will generate a large amount of heat when working, and the PGU cannot work normally due to the high temperature; the heat dissipation structure can quickly and timely transfer the heat generated by the PGU from the light guide bracket to the outside of the HUD optical machine, thereby ensuring that the PGU is in a suitable stable temperature environment, thereby ensuring its normal projection work.

[0018] The PGU includes a light board; the HUD optical engine includes a back cover. As a solution, the back cover is directly connected to the light board, so that the heat generated by the PGU can be directly conducted to the outside of the HUD optical engine through the back cover, thereby ensuring that the temperature of the PGU working environment is constant and avoiding overheating.

[0019] As another solution, a heat sink is provided between the back cover and the light board, and thermal conductive silicone is also provided between the heat sink and the light board; thereby, a large amount of heat generated by the light board can be quickly conducted to the back cover, and then transferred to the external environment through the back cover; thereby achieving rapid heat dissipation of the PGU.

[0020] The heat dissipation structure for the PGU of the vehicle-mounted HUD optical machine is provided on a light guide bracket, and the PGU is connected to the light guide bracket; the heat dissipation structure can quickly and timely transfer the heat generated by the PGU from the light guide bracket to the outside of the HUD optical machine; thereby ensuring that the PGU is in a suitable stable environment, thereby ensuring that it can perform projection work normally. The PGU includes a light board; the HUD optical machine includes a back cover. As one solution, the back cover is directly connected to the light board; as another solution, a heat sink is provided between the back cover and the light board, and a thermal conductive silicone is also provided between the heat sink and the light board; thereby, a large amount of heat generated by the light board can be quickly transferred to the back cover, and then transferred to the external environment through the back cover; thereby achieving rapid heat dissipation of the PGU. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the HUD optical machine with a heat dissipation structure for the PGU of this vehicle-mounted HUD optical machine.

[0023] Figure 2 This is a schematic diagram of the structure of the light guide bracket of the heat dissipation structure for the PGU of the vehicle-mounted HUD optical machine.

[0024] The marks in the above figure are:

[0025] The markings in the figure are:

[0026] 1. HUD optical machine,

[0027] 2. Light guide bracket, 21. Heat dissipation hole, 22. First heat dissipation hole, 23. Second heat dissipation hole, 24. Third heat dissipation hole, 25. PGU cover, 26. TFT display screen,

[0028] 3. PGU, 31. Light board, 32. Heat sink, 33. Diffuser, 34. Backlight bracket, 35. Backlight cover, 36. Polarizer, 37. Fresnel lens. DETAILED DESCRIPTION

[0029] The following is a further detailed explanation of the specific implementation methods of the utility model through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the utility model and facilitating its implementation.

[0030] Figure 1 The heat dissipation structure for the PGU of the vehicle-mounted HUD optical machine shown includes a HUD optical machine 1, wherein a light guide bracket 2 and a PGU 3 connected to the light guide bracket 2 are provided inside the HUD optical machine 1; and a heat dissipation structure is provided on the light guide bracket 2.

[0031] PGU3 will generate a lot of heat when working, and PGU3 cannot work normally due to high temperature. The heat dissipation structure can quickly and timely transfer the heat generated by PGU3 from the light guide bracket 2 to the outside of the HUD optical machine 1, thereby ensuring that PGU3 is in a suitable stable temperature environment, thereby ensuring its normal projection work.

[0032] The heat dissipation structure includes a heat dissipation hole 21, which is provided on the side wall of the light guide bracket 2. The PGU3 is installed inside the light guide bracket 2; the heat dissipation hole 21 is a through hole, connecting the inside of the HUD optical machine 1 with the outside; the heat generated by the PGU3 can be quickly transferred to the outside through the heat dissipation hole 21; thereby ensuring the working temperature of the PGU3 is stable, so that it can work normally.

[0033] The heat dissipation holes 21 include a first heat dissipation hole 22, a second heat dissipation hole 23 and a third heat dissipation hole 24; the first heat dissipation hole 22 is arranged at the top of the light guide bracket 2, the second heat dissipation hole 23 is arranged at the bottom of the light guide bracket 2, and the third heat dissipation holes 24 are respectively arranged on both sides of the light guide bracket 2.

[0034] The first heat dissipation holes 22, the second heat dissipation holes 23 and the third heat dissipation holes 24 are all square holes; the first heat dissipation holes 22 are arranged in pairs at the top of the light guide bracket 2, and the second heat dissipation holes 23 are arranged in pairs at the bottom of the light guide bracket 2; the first heat dissipation holes 22, the second heat dissipation holes 23 and the third heat dissipation holes 24 can enable the interior of the light guide bracket 2 to exchange heat with the external environment through the four side walls, so that the heat dissipation speed is faster and the heat dissipation effect is better.

[0035] PGU3 includes a light board 31; HUD optical engine 1 includes a back cover. The light board 31 of PGU3 is a light source. The light board 31 generates a lot of heat. Overheating of the light board 31 may cause it to be damaged or unable to function normally. Therefore, it is necessary to dissipate heat from the light board 31. The back cover is located at the rear of the housing of the HUD optical engine 1 and can seal the HUD optical engine 1.

[0036] As a solution, the back cover is connected to the light board 31. The back cover is connected to the light board 31 in an integrated manner, so that the heat generated by the light board 31 can be directly conducted to the outside of the HUD optical machine 1 through the back cover, thereby ensuring that the temperature of the working environment of the PGU3 is constant and avoiding overheating. This heat dissipation method can make the internal structure of the HUD optical machine 1 more compact and enable it to have a smaller volume.

[0037] As another solution, a heat sink 32 is provided between the rear cover and the light board 31. The heat sink 32 can quickly transfer a large amount of heat generated by the light board 31 to the rear cover, and then transfer it to the external environment through the rear cover; thereby achieving rapid heat dissipation of the PGU3. This heat dissipation method has a fast heat dissipation speed and a better heat dissipation effect.

[0038] A heat conducting member is provided between the heat sink 32 and the lamp board 31. The heat conducting member can enhance the heat transfer effect between the lamp board 31 and the heat sink 32, accelerate the heat dissipation speed of the lamp board 31, and enhance the heat dissipation effect.

[0039] The heat conducting part is heat-conducting silicone. Heat-conducting silicone is a silicone rubber that can be cured at room temperature, which can effectively cool or bond the light board 31. It can also be formed into an elastomer with relatively high hardness in a short time. After the heat-conducting silicone is cured, it can be attached to the surface in contact with the product to effectively reduce thermal resistance, and then conduct heat dissipation with the heat sink 32. It will not corrode the surface of the light board 31 and the heat sink 32.

[0040] PGU3 includes a backlight bracket 34; a light board 31 is provided on one side of the backlight bracket 34, and a backlight cover plate 35 is provided on the other side of the backlight bracket 34; a polarizer 36, a Fresnel lens 37 and a diffuser 33 are provided between the backlight cover plate 35 and the backlight bracket 34, respectively. The light emitted by the light board 31 is processed by the polarizer 36, the Fresnel lens 37 and the diffuser 33 in sequence, and then can be projected and the image can be displayed normally; the backlight bracket 34 provides installation positions for the light board 31, the polarizer 36, the Fresnel lens 37 and the diffuser 33, respectively; the backlight cover plate 35 fixes the polarizer 36, the Fresnel lens 37 and the diffuser 33 on the backlight bracket 34.

[0041] A PGU 3 is provided on one side of the light guide bracket 2, and a PGU cover plate 25 is provided on the other side of the light guide bracket 2; a TFT display screen 26 is provided between the light guide bracket 2 and the PGU cover plate 25. The light emitted by the PGU 3 is projected on the TFT display screen 26, so that images and data can be displayed; important driving information such as speed and navigation can be displayed on the HUD display screen in front of the driver, so that the driver can see important driving information such as speed and navigation without lowering or turning his head as much as possible.

[0042] The specific working process of the utility model is as follows:

[0043] The first heat dissipation hole 22, the second heat dissipation hole 23 and the third heat dissipation hole 24 are respectively opened on the light guide bracket 2; the PGU3 is installed inside the light guide bracket 2; the back cover of the HUD optical machine 1 is directly connected to the light board 31 or a heat sink 32 is arranged between the back cover of the HUD optical machine 1 and the light board 31, and thermal conductive silicone is applied between the heat sink 32 and the light board 31. In this way, the PGU3 can be fully cooled.

[0044] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A heat dissipation structure for PGU of a vehicle-mounted HUD optical machine, Features: The HUD optical engine (1) comprises a light guide bracket (2) and a PGU (3) connected to the light guide bracket (2) provided inside the HUD optical engine (1); and a heat dissipation structure is provided on the light guide bracket (2).

2. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 1, Features: The heat dissipation structure comprises a heat dissipation hole (21), and the heat dissipation hole (21) is arranged on the side wall of the light guide bracket (2).

3. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 2, Features: The heat dissipation holes (21) comprise a first heat dissipation hole (22), a second heat dissipation hole (23) and a third heat dissipation hole (24); the first heat dissipation hole (22) is arranged at the top of the light guide bracket (2), the second heat dissipation hole (23) is arranged at the bottom of the light guide bracket (2), and the third heat dissipation hole (24) is respectively arranged on both sides of the light guide bracket (2).

4. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 3, Features: The PGU (3) includes a light board (31); and the HUD optical engine (1) includes a back cover.

5. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 4, Features: The rear cover is connected to the light board (31).

6. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 4, Features: A heat sink (32) is provided between the rear cover and the lamp panel (31).

7. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 6, Features: A heat conducting member is provided between the heat sink (32) and the lamp board (31).

8. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 7, Features: The heat conducting member is heat conducting silica gel.

9. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to any one of claims 4 to 8, Features: The PGU (3) comprises a backlight bracket (34); the light board (31) is provided on one side of the backlight bracket (34), and a backlight cover plate (35) is provided on the other side of the backlight bracket (34); a polarizing plate (36), a Fresnel lens (37) and a diffuser (33) are respectively provided between the backlight cover plate (35) and the backlight bracket (34).

10. The heat dissipation structure for PGU of the vehicle-mounted HUD optical machine according to claim 9, Features: The PGU (3) is provided on one side of the light guide bracket (2), and a PGU cover plate (25) is provided on the other side of the light guide bracket (2); a TFT display screen (26) is provided between the light guide bracket (2) and the PGU cover plate (25).

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